Improvement in pitman



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sary fric superiorto a JOHN BUTTER,` OF sumwiLO,V NEW 1 Y-O RK.` Letters Patent No. 71,450, dated November 2Q, 1867. i

IMPROVEMENT IN PITMAN.

TO ALL WHOM IT MAY CONCERN: t.

Be it known that I, JOHN BUTTER, of the city of Buialo, county of Erie, and State of New York, have invented a certain new and improved Connecting-Rod for Mowing-Machines; and I do hereby declare that tho following is a. full and exact description thereof, refcrencebcing had 'to the accompany-ing drawing, making a ,i

part of this specification, in which- Figure I isa sectional elevation.

Figure II is a top plan view.

The nature of this invention relates to the construction of a ball-and-socket joint, forthe purpose of ceun necting the` connecting-rod of a mowing-machine to the cutter-bar thereof; and consists, rst, in dividing the socket into two parts, the lower one of which is fastened to the cutter-bar, and the upper one screwed into the lower one, so as to allow an easy removal of the former for the purpose of inserting the connecting-.rodball second, in dividing the spherical end or ball of the connecting-rod into two hemispheres, with a packing interp,

posed, so as to enable the same to be adjusted to the spherical inside of the socket, when theball and socket become worn by the jar of thefmachine; third, in providing the socket with a quadrant-opening or slot fo'the .l passage of the connecting-rod, so as to allow the cutter-bar to assume any position,from the. horizontal to the *i vertical; fourth, in providing the Socket with u spring-stop, for the purpose of preventing the upper part or cover from working loose by the jar of the machine.

Letters of like name and kind refer to like parts in each of the figures.

A represents the connecting-rod, made in one piece with the hemisphere B and the screw-bolt C. The latter serves the purpose of holding the hemispheres B and D together. A packing, E, is interposed, which may bc vtaken out and replaced by a thicker one, when the jar of the machine has worn the ball and socket, so` as to cause lash in the working thereof, so that under all circumstances a perfect fitting of the ball to the spherical inside of means of a pin placed in to the hole J. F is the lower part or main body of .the spherical socket, fastened to the cutter-bar H, and corresponds in size with the ball or sphere on the end of the connecting-rod A. It is provided at its upper end with a screw-thread for receiving the upper part or coveaG, `the latter forming, `with the lower part, when screwed to it, a perfect' hollow sphere, in which the sphere on the' end of the connecting-rod closely lits. I is an opening or slot, through which the connecting-rod issues, cut into both the main body and theV cover of the socket, and allowing the .cutter-bar to assume any position, from the horizontal to the vertical,

'the latter being used when the machine is not in operation, and the cutter-bar folded for transportation. This slot also allows the connecting-rod a slight sidewise movement, resulting from the fact that the crank-shaft is i rally not in the same plane withrthre cutter-bar; K isa spring-stop, fastened by screws to-thc mainV body' oket, fitting to a notch, L, out into the projecting rim of the cover G. It serves the purpose of retains proper position against the jar of the machine. Otherwise,the covenwould. be liable to d interfere with the connecting-rod within the limits allowed to the latter by the slot` or gene of the so ing the cover in it become turned, an

opening I. l

For the purpose of establishlng the connect1on between the connecting-rod and the cutter-bar, the cover of the socket is unserewed, the spherical end or ball of the connecting-rod put into the lower part' or main body of the socket, and then the upper part or .cover is screwed to tho lower part of the socket, so forming a perfect closely-working joint, and at the same time allowing the connecting-rod and cutter-bar any necessary freedom of movement for enabling the machine to perform its work in the best manner.

When the ball and socket becoincfworn by long use, it only needs the insertion of a new and thicker packl ing between the two hemispheres to again adapt the ball orspherical end of the connecting-rod to the spherical inside of the sockett l l l It wm readily be seen from the foregoing discriptlfm fh my improved connecting-rod avoids all unnecestion resulting from the heretofore imperfect a1-.rangement of the joint, and gives the latter a ilexibility What I claim as my invention, and desire to secure by Letters Patent, is

A1. Constructing the Socket in two parts,v'F and G, the lower one .of which is fastened to the cutter-bar, for

the purpose land substantially as described. 2. Constructing the spherical end or b with interposed packing E, for the purpose and substantially asset forth,

3. Providing the socket with an opening or slot, I, for the purpose as herein described.

4. The spring-stop K, for the purpose and substantially, as set Toi-th.

JOHN BUTTER.

Witnesses:

VW. H. Formosa, `Einw. WILHELM.

the soeketmay be obtained. Thescrcwing on and unscrewing of the half-sphere D is performed by ny heretofore-known device for coupling the connecting-rod and cutter-bar of inowing-nzlachines.` p

all of the connecting-rod of two independenthemispheres B and D 

